Accession Number : AD0691262

Title :   BI-DIRECTIONAL SCATTERING CHARACTERISTICS OF HEALTHY, GREEN SOYBEAN AND CORN LEAVES IN VIVO,

Corporate Author : PURDUE UNIV LAFAYETTE IND SCHOOL OF ELECTRICAL ENGINEERING

Personal Author(s) : Breece,Harry T. , III ; Holmes,Roger A.

Report Date : APR 1969

Pagination or Media Count : 267

Abstract : Measurements were made to determine the bi-directional scattering characteristics of living, green soybean and corn leaves in the range from 375 mm to 1 millimicron m. A goniometer was constructed to study bi-directional scattering on the leaves of potted soybean and corn plants. The leaf sample was held in a plane and light of a selected wavelength was incident at a given angle. A detector was then moved around the sample at a constant radius resulting in a polar plot of scattered radiant power as a function of observation angle for a given angle of incidence and wavelength. The results show strong specular components of reflection in addition to diffuse components for both soybean and corn leaves. The results describe a simple four layer bi-directional scattering model for a soybean leaf. This model has a rough surface with isotropy relative to the midvein. The results for a corn leaf describe a simple three layer bi-directional scattering model. This model has a rough surface with a definite anisotropy relative to the midvein. The results are two-dimensional polar graphs. Measurements were carried out which indicate the extension of these results to three dimensions. (Author)

Descriptors :   (*PLANT TISSUE, INFRARED PHENOMENA), (*AERIAL RECONNAISSANCE, PLANTS(BOTANY)), CORN, SCATTERING, MONOCHROMATIC LIGHT, CHLOROPHYLLS, FLUORESCENCE, ABSORPTION, INFRARED DETECTORS, REFLECTION, LIGHT TRANSMISSION, INSTRUMENTATION, DATA PROCESSING, MATHEMATICAL MODELS, INFRARED SPECTRA

Subject Categories : Agronomy, Horticulture and Aquiculture
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE